Final answer:
To find the percentage of white cars out of the total number of cars, divide the number of white cars by the total number of cars and then multiply by 100.
Step-by-step explanation:
The percentage can be found by dividing the value by the total value and then multiplying the result by 100. The formula used to calculate the percentage is: (value/total value)×100%.
We use percentages to make calculations easier. It is much simpler to work with parts of 100 than thirds, twelfths and so on, especially because quite a lot of fractions do not have an exact (non-recurring) decimal equivalent.
The most basic application of percentages is to compare one quantity against another, with the second quantity rebased to 100. Let's say we are interested in the number of employed females as a percentage of all employed. If this fraction is 1/2 , it means in general, for every two employed persons, one is a female.
To find the percentage of white cars out of the total number of cars, we need to divide the number of white cars by the total number of cars and then multiply by 100.
Total number of cars = 18 + 12 + 22 + 7 = 59
Percentage of white cars = (18/59) * 100 = 30.51%